Sulfinate‐Organocatalyzed (3+2) Annulation of Allenyl Sulfones with 1,1‐Dicyano Olefins in the Presence of a Quaternary Ammonium Phase Transfer Agent

2018 ◽  
Vol 360 (14) ◽  
pp. 2696-2706 ◽  
Author(s):  
Thomas Martzel ◽  
Jean‐François Lohier ◽  
Annie‐Claude Gaumont ◽  
Jean‐François Brière ◽  
Stéphane Perrio
Keyword(s):  
Quaternary Ammonium ◽  
Phase Transfer ◽  
Phase Transfer Agent

scholarly journals A Remarkably Efficient Phase-Transfer Catalyzed Amination of α-Bromo-α, β-Unsaturated Ketones in Water

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Alemayehu Mekonnen ◽  
Alemu Tesfaye
Keyword(s):  
Quaternary Ammonium ◽  
Phase Transfer ◽  
Conjugate Addition ◽  
Quaternary Ammonium Salts ◽  
Cinchona Alkaloids ◽  
Ammonium Salts ◽  
Alkylation Reaction ◽  
Pt Catalysts ◽  
Unsaturated Ketones ◽  
Catalytic Performances

Tandem conjugate addition–alkylation reaction of various amines with α-bromo-α, β-unsaturated ketones resulted in near-quantitative conversions into the corresponding aziridines when the reaction was carried out in the presence of 10 mol% of phase-transfer, PT catalysts in water. Some chiral quaternary ammonium salts derived from Cinchona alkaloids were investigated as water-stable PT catalysts. The scope and limitations of the reaction have also been investigated. The catalytic performances were significantly improved in comparison with the corresponding ordinary quaternary ammonium salt catalysts, and excellent yields (81%–96%) were obtained. Although an increase in the rate of aziridination has been accomplished, no stereoselectivity was observed. The positive values of the protocol have been confirmed.

Vehicle-saving theranostic probes based on hydrophobic iron oxide nanoclusters using doxorubicin as a phase transfer agent for MRI and chemotherapy

2019 ◽  
Vol 55 (61) ◽  
pp. 9015-9018 ◽  
Author(s):  
Yanbing Cao ◽  
Juan Min ◽  
Dongye Zheng ◽  
Jiong Li ◽  
Yanan Xue ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Phase Transfer ◽  
Simple Approach ◽  
Phase Transfer Agent

A simple approach for constructing vehicle-saving theranostic nanobeads for MRI and chemotherapy is developed by using doxorubicin for phase transfer of iron oxide nanoclusters.

Some organic syntheses with clay-supported reagents

Clay Minerals ◽  
1983 ◽  
Vol 18 (4) ◽  
pp. 437-445 ◽  
Author(s):  
A. Cornelis ◽  
P. Laszlo ◽  
P. Pennetreau
Keyword(s):  
Organic Synthesis ◽  
Quaternary Ammonium ◽  
Phase Transfer ◽  
Ferric Nitrate ◽  
Organic Syntheses ◽  
Carbonyl Derivatives ◽  
Fine Organic Synthesis ◽  
Fine Organic

AbstractSome uses of clay-supported reagents in fine organic synthesis are discussed, in particular the catalysis of the phase-transfer preparation of formaldehyde acetals by quaternary ammonium montmorillonites. The preparation and some applications of clay-supported ferric nitrate, a new reagent which oxidizes alcohols into carbonyl derivatives, couples thiols into disulphides, nitrates phenols, and oxidatively couples pyrrole and benzaldehyde into tetra-phenylporphyrin, are also described

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